Niko..are you even Hmong? If you are than this is very disappointing that a Hmong person does not know or been to a traditional funeral. Hmong funerals are like stories, that are told when one marries until dead when one departs. They involve families and in-laws.
The qeej is just one important aspect of the funeral. There are thawj lwm tub ncig(cuab tsav, kav xwm, thawj xyom cuab, tswj kab, txiv taw kev, txiv qeej, etc) maum phauj, txiv xov dab, txiv dab laug, txiv coj xaiv.
We qeej players understand some of each other's notes since all the songs are somewhat similar in words. The drum beats follow the qeej in a ceremony. The first and longest song, "last breath", can last as long as 8 hours.
I learned three, 4 hours, 6 hours, and 8 hours. Depending on the age of the death, a child gets the 4 hour song, middle aged person gets 6 hours, and old person gets the 8 hours. Some players just learned one(1).
Funeral songs have very profound meaning and thus we are prohibited from playing inside a residence or even learning inside a home. It is believed these sad notes can lure away your house spirit or your own spirit and cause you illness.